<template>
  <div>
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>

    <el-card>
      <el-alert title="消息提示的文案" type="info" center show-icon :closable="false"></el-alert>
      <el-steps :space="200" :active="activeIndex - 0" finish-status="success" align-center>
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>

      <el-form
        :model="addForm"
        :rules="addFormRules"
        label-width="100px"
        label-position="top"
        ref="addFormRef"
      >
        <!-- tab栏区域 -->
        <el-tabs
          :tab-position="'left'"
          v-model="activeIndex"
          :before-leave="beforeLeaveTab"
          @tab-click="tabClicked"
        >
          <el-tab-pane label="基本信息" name="0">
            <el-form-item prop="goods_name" label="商品名称">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item prop="goods_price" type="number" label="商品价格">
              <el-input v-model="addForm.goods_price"></el-input>
            </el-form-item>
            <el-form-item prop="goods_weight" type="number" label="商品重量">
              <el-input v-model="addForm.goods_weight"></el-input>
            </el-form-item>
            <el-form-item prop="goods_number" type="number" label="商品数量">
              <el-input v-model="addForm.goods_number"></el-input>
            </el-form-item>
            <el-form-item label="商品分类" prop="goods_cat">
              <el-cascader
                expandTrigger="hover"
                v-model="addForm.goods_cat"
                :options="cateList"
                :props="cateProps"
                clearable
                @change="parentCateChanged"
              ></el-cascader>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品参数" name="1">
            <el-form-item :label="item.attr_name" :key="item.attr_id" v-for="item in manyTableData">
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox border :label="val" v-for="(val,i) in item.attr_vals" :key="i"></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性" name="2">
            <el-form-item :label="item.attr_name" :key="item.attr_id" v-for="item in onlyTableData">
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片" name="3">
            <el-upload
              :action="uploadURL"
              :on-preview="handlePreview"
              :on-remove="handleRemove"
              list-type="picture"
              :headers="headerObj"
              :on-success="handleSuccess"
            >
              <el-button size="small" type="primary">点击上传</el-button>
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name="4">
            <quill-editor v-model="addForm.goods_introduce"></quill-editor>
            <!-- 添加商品按钮 -->
            <el-button type="primary" class="btnAdd" @click="add">添加商品</el-button>
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>

    <!-- 图片预览 -->
    <el-dialog title="图片预览" :visible.sync="previewVisible" width="60%">
      <img :src="previewPath" class="previewImg" />
    </el-dialog>
  </div>
</template>

<script>
import _ from 'lodash';
export default {
  data() {
    return {
      activeIndex: '0',
      addForm: {
        goods_name: '',
        goods_price: 0,
        goods_number: 0,
        goods_weight: 0,
        goods_cat: [],
        pics: [],
        goods_introduce: '',
        attrs: []
      },
      addFormRules: {
        goods_name: [
          { required: true, message: '请输入商品名称', trigger: 'blur' }
        ],
        goods_price: [
          { required: true, message: '请输入商品价格', trigger: 'blur' }
        ],
        goods_number: [
          { required: true, message: '请输入商品数量', trigger: 'blur' }
        ],
        goods_weight: [
          { required: true, message: '请输入商品重量', trigger: 'blur' }
        ],
        goods_cat: [
          { required: true, message: '请输入商品分类', trigger: 'blur' }
        ]
      },
      cateList: [],
      cateProps: {
        value: 'cat_id',
        label: 'cat_name',
        children: 'children'
      },
      manyTableData: [],
      onlyTableData: [],
      uploadURL: 'http://127.0.0.1:8888/api/private/v1/upload',
      headerObj: { Authorization: window.sessionStorage.getItem('token') },
      previewPath: '',
      previewVisible: false,
      attrs: []
    };
  },
  created() {
    this.getCateList();
  },
  methods: {
    async getCateList() {
      const { data: res } = await this.$http.get('categories');
      if (res.meta.status !== 200) {
        return this.$message.error('获取商品分类列表失败！');
      }
      this.cateList = res.data;
    },
    parentCateChanged() {
      if (this.addForm.goods_cat.length !== 3) {
        this.addForm.goods_cat = [];
      }
    },
    beforeLeaveTab(activeName, oldActiveName) {
      if (oldActiveName === '0' && this.addForm.goods_cat.length !== 3) {
        this.$message.error('请选择商品的分类');
        return false;
      }
    },
    async tabClicked() {
      if (this.activeIndex === '1') {
        const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          { params: { sel: 'many' } }
        );

        if (res.meta.status !== 200) {
          return this.$message.error('获取动态参数列表失败');
        }
        res.data.forEach(element => {
          element.attr_vals =
            element.attr_vals.length === 0 ? [] : element.attr_vals.split(' ');
        });
        console.log(res);

        this.manyTableData = res.data;
      } else if (this.activeIndex === '2') {
        const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          { params: { sel: 'only' } }
        );
        if (res.meta.status !== 200) {
          return this.$message.error('获取动态参数列表失败');
        }
        this.onlyTableData = res.data;
      }
    },
    handlePreview(file) {
      this.previewPath = file.response.data.url;
      this.previewVisible = true;
    },
    handleRemove(file) {
      const filePath = file.response.data.tmp_path;
      const index = this.addForm.pics.findIndex(item => item.pic === filePath);
      this.addForm.pics.splice(index, 1);
    },
    handleSuccess(response) {
      this.addForm.pics.push({ pic: response.data.tmp_path });
    },
    add() {
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) {
          return this.$message.error('请填写必要的表单项!');
        }
        const form = _.cloneDeep(this.addForm);
        form.goods_cat = form.goods_cat.join(',');
        this.manyTableData.forEach(item => {
          this.addForm.attrs.push({
            attr_id: item.attr_id,
            attr_value: item.attr_vals
          });
        });

        this.onlyTableData.forEach(item => {
          this.addForm.attrs.push({
            attr_id: item.attr_id,
            attr_value: item.attr_vals
          });
        });

        form.attrs = this.addForm.attrs;

        const { data: res } = await this.$http.post('goods', form);
        if (res.meta.status !== 200) {
          this.$message.error('添加商品失败！');
        }
        this.$message.success('添加商品成功！');
        this.$router.push('/goods');
      });
    }
  },
  computed: {
    cateId() {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2];
      }
      return null;
    }
  }
};
</script>

<style lang="less" scoped>
.el-checkbox {
  margin: 0 10px 0 0 !important;
}

.btnAdd {
  margin-top: 15px;
}
</style>
